Centrifugal pump.



G. G. KUECHLER.

GBNTRIFUGAL PUMP.

APPLICATION FILED 001'. 1a. 1910v Patented Apr. 9, 1912.

2 SHEETS SHEET 1v 25 gw mi INVENTOR Eusia EharIe5 Kue chler; E w Allorney G. C. KUECHLER.

CENTRIFUGAL PUMP.

APPLICATION FILED 001:. 1a, 1910.

Patented Apr. 9, 1912.

2 SHEETS-SHEET 2.

INVENTOR Bu sTa Charles K'u E [2111 er,

33 Attorney WITSSES l/yz W/L VIM To all whom it may concern:

GENTRIFUGAL PUMP.

Specification of Letters Patent.

- Patented Apr. e, 1912.

-Application filed October 18, 1910. Serial No. 588,013.

Be it known that I. GUSTA G. KUEci rLnn, a citizen of the United States and a-resident of Sacramento, in the county of Sacramento and State of California, have invented new- Improvements in Centrifugal Pumps, of

' which the following is a specification, refercentrifugal pump. .2

-ence being had to the accompanying drawmgs.

My invention relates almost entirely to the rotor or revolvingmember of a centrifugal pump.

Figure 1 of the accompanying drawings represents a cross section of apump equipped with my improved rotor. Fig. 2 rep resents a detail of the said rotor. Fig. 3 represents a cross section of same. Fig, 4 represents a part of the said rotor, the purpose of which will be explained later. Fig.

5 is avertical cross section 'of the same.

In Fig. 1 1 represents the foundation of the pump, which is the same as any ordinary represents a part of the outer shell of the pump, which is bolted to the foundation (1) by means of bolts inserted at intervals in the groove (3). 4 is the main part of the outer shell in which the rotor revolves in the Well known manner. 3 represents a groove similar to groove 3,

in which bolts are inserted so that a pipe flange may bebolted on.- 5 represents the suction and 6 the discharge end of the pump. 7 represents the shaft, 8 the bearing for same, 9 a bushing which may be secured in one end of the packing box and made ad justable so the packing in'the space (10) may be put under pressure to prevent any air entering the pump proper. On the shaft 7 is secured my improved runner or rotor (12), which consists of two round flat metal pieces secured together by the well known ribs-not shown in Fig. 1, but

indicated in Fig. 2 by the curvedlines a. b. c. d. e. f. r

When this pump is connected to a supply of water, or other liquid, at the inlet (5) and the shaft (7) rotated, the liquid will be sucked into the inlet and discharged through the outlet (6). In the ordinary centrifugal pump, the back pressure of the water being discharged, will force some of the, water .ner, a number of holes, (14) are then made near the outer edge of the runner and a number of smaller holes, (15) near the center of the runner. A plate, (16) (shown to better. advantage in Fig. 4) having holes corresponding in size and position to the holes 14 and 15 in the runner is then secured to the runner by means of screws, 17. Slotted holes (18) are made in the disk (16) so that when the screws. (17 are loosened the diskmay be shifted a small amount. It is obvious by shifting the disk 16, the holes 14 and.15i may be closed or; opened to any extent desired. I employ these means of adjusting the sizeofthe holes Hand 15, which I find necessary, as a given size of hole will worksuccessfully when pumping against a certain head but will not wor satisfactorily with a higher or a lower head. The casing 4 and the runner 12 are so constructed that a practically water tight joint is made at 30, so that the only place where water can enter the compartment 20 is through theholes 14 and 15. This isobviously necessary in order that the amount of water entering the compartment 20 can be regulated by means of the adjusting mechanism above referred to.

Unless-a very close fit is made between the casing 4 and the runner 12 the back pressure would force water into thecompartment 20 and destroy the balance.

Having described the construct-ion of the pump I will now proceed to show how it will work. in actual use: Assuming. that the suction end 5' is connected to a water supply,

and a source of power applied to the-shaft (7 When the pumpis properly primed suction will take place and water; will be drawn into the opening fi and discharged freely there is no friction at the outlet (6) If the water is discharged at 6 against a pressure, water will be forced into the compartment (18) between the rotor (12) and the outer casing (4). With the ordinary pump the pressure of the Water in the spaces 13 and 20 would force the rotor to one side or the other and cause a great deal of end thrust or friction at the bearing. WVith my improved construction, a certain amount of Water will flow through the openings 14 into the compartment 20, the amount being regulated by means of the disk 16, as above explained, The back pressure of .the pump will force water through the holes, fill up the'compartment 20 and flow back into the runner through the holes 15. By properly regulating the size of the holes, sufiiclent water will: be circulated through the space 20 to'exact-ly balance the pressure exerted by the water in space 13. It is obvious that the runner revolves without end thrust, and therefore except the ordinary bearing friction.

It will be seen that the disk 16, constitutes valve controlling means for regulating the flow of liquid into the normally closed chamber 20. The chamber 20 may be conveniently designated a normally closed-chamber as any liquid passing thereto is dependent upon the disposition also-be noted that by reason of difierence in thesize of the. openings 15 and 14-, andthe radial disposition thereof, a differential control to and from the normally closed chamber may-be obtained, This differential control is obtained by reason of the fact that movement of the adjustable plate or disk 16 causes the radial outer and inner apertures to be chained in area in different relative proportions.

. I claim- 1. A centrifugal pump comprising in combination, a casing having an inlet and an'outlet, a rotor in said casing spaced apart from the walls thereof to form liquid receiving chambers on each side of said rotor, one' of said chambers being normally open to an inflow of liquid and the other chamber being normally closed to such inflow, and differential valve controlling means for permitting an inflow to the closed chamber to automatically counteract the thrust on said rotor-from said, open chamber. i

2. A centrifugal pump comprising in combination, a casing having an inlet and an outlet, a rotor in said casing spaced apartfrom the walls thereof to form liquid receiving chambers, one of said chambers being normally open to the liquid passing through said pump and the other chamber being normally closed to such liquid, and

of the disk 16. It will differential valve cont-rolling adjustable means on said rotor for permitting a variable inflow to said closed chamber to automatically counteract the thrust on said roon said rotor from said open chamber.

4; A centrifugal pump ,comprising in combination, a casingjhaving an inlet-and an outlet, a rotor in said casing spaced apart from the Walls thereof to form liquid receiving chambers on opposite sides of the rotor, one of said chambers being n rmally open to. the liquid passing through said pump and the other being closed thereto, and adjustable valve controlling I'HGLDS permitting an inflow from the "pump }to said normally closed chamber and an ,loutflow from such chamber backfto the corresponding to the variation of'pr the open chamben- 5.'A centrifugal pump, compitising ll" combination, a casing having amfilnlet and an outlet, a rotor in saidca'sing spa bed apart from the walls thereof to form,ffjrotor balancing chambers, one of said c ajmbers be ing normally opened to the "liquid passing through said pum and the other chamber being normally 0 osed, the rotor having openings permitting entrance of the liquid to said closed chamber, and an element adustably carried by said rotor for controlling said opening.

6. A centrifugal pump comprising in combination,acasing having an inlet and an outlet, a rotor in said casing spaced apart from the walls thereof to form rotor balancing liquid chambers, one of said chambers being normally opened to the liquid passing through said pump and the other cham her being normally closed, the rotor having openings of different sizes permitting en trance of the liquid to and egress from said I normally closed chamber, and means carried by the rotor for wholly closing certain of said openings and controlling the size of other openings in said rotor, substantially described.

7. A centrifugal pump comprising in combination, a casing having an inlet and an outlet, a rotor in said casing spaced apart from the walls thereof to form liquid rotor balancing chambers, one of saidehambers being normally opened to the liquid passing through-said pump and the other cham- 5 her being normally closed, the rotor having openings permitting entranceof the liquidv from the nterior of the pump to said nor-- mally cloeed chamber and egressxtherefrom back to the interior of the pump, and adisk .-concentrically mounted with respect to the rotors for controlling passage of the liquid through said 0 emngs. v

' I USTA C. KUECHLER.

Witnesses:

' W. A. LATTA, 

